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tools: Free BTF objects at various locations

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[ Upstream commit 369e955b3d1c12f6ec2e51a95911bb80ada55d79 ]

Make sure to call btf__free() (and not simply free(), which does not
free all pointers stored in the struct) on pointers to struct btf
objects retrieved at various locations.

These were found while updating the calls to btf__get_from_id().

Fixes: 999d82cbc0 ("tools/bpf: enhance test_btf file testing to test func info")
Fixes: 254471e57a ("tools/bpf: bpftool: add support for func types")
Fixes: 7b612e291a ("perf tools: Synthesize PERF_RECORD_* for loaded BPF programs")
Fixes: d56354dc49 ("perf tools: Save bpf_prog_info and BTF of new BPF programs")
Fixes: 47c09d6a9f ("bpftool: Introduce "prog profile" command")
Fixes: fa853c4b83 ("perf stat: Enable counting events for BPF programs")
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210729162028.29512-5-quentin@isovalent.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Quentin Monnet 2021-07-29 17:20:24 +01:00 committed by Greg Kroah-Hartman
parent 3d79bc7e88
commit d75d6b94aa
4 changed files with 9 additions and 4 deletions
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5
tools/bpf/bpftool/prog.c
View File

@ -781,6 +781,8 @@ prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
kernel_syms_destroy(&dd);
}
btf__free(btf);
return 0;
}
@ -2002,8 +2004,8 @@ static char *profile_target_name(int tgt_fd)
struct bpf_prog_info_linear *info_linear;
struct bpf_func_info *func_info;
const struct btf_type *t;
struct btf *btf = NULL;
char *name = NULL;
struct btf *btf;
info_linear = bpf_program__get_prog_info_linear(
tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO);
@ -2027,6 +2029,7 @@ static char *profile_target_name(int tgt_fd)
}
name = strdup(btf__name_by_offset(btf, t->name_off));
out:
btf__free(btf);
free(info_linear);
return name;
}

4
tools/perf/util/bpf-event.c
View File

@ -296,7 +296,7 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_session *session,
out:
free(info_linear);
free(btf);
btf__free(btf);
return err ? -1 : 0;
}
@ -486,7 +486,7 @@ static void perf_env__add_bpf_info(struct perf_env *env, u32 id)
perf_env__fetch_btf(env, btf_id, btf);
out:
free(btf);
btf__free(btf);
close(fd);
}

3
tools/perf/util/bpf_counter.c
View File

@ -64,8 +64,8 @@ static char *bpf_target_prog_name(int tgt_fd)
struct bpf_prog_info_linear *info_linear;
struct bpf_func_info *func_info;
const struct btf_type *t;
struct btf *btf = NULL;
char *name = NULL;
struct btf *btf;
info_linear = bpf_program__get_prog_info_linear(
tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO);
@ -89,6 +89,7 @@ static char *bpf_target_prog_name(int tgt_fd)
}
name = strdup(btf__name_by_offset(btf, t->name_off));
out:
btf__free(btf);
free(info_linear);
return name;
}

1
tools/testing/selftests/bpf/prog_tests/btf.c
View File

@ -4386,6 +4386,7 @@ skip:
fprintf(stderr, "OK");
done:
btf__free(btf);
free(func_info);
bpf_object__close(obj);
}